So up until about 6 months ago, I was perfectly sexually healthy. Everything was working fine. But something has happened since then. I'm still very sexually active in the sense that I want to have sex, but I have to work at it to achieve an erection. By the time I have a full erection, i'm already about to ejactulate. I'm only 17 years old.

I've read that a common cause of ed is lack of nitric oxide, and that supplements such as ginseng can really help. Should I try it?